Re: [PATCH v3 5/5] tty/serial: Add Spreadtrum sc9836-uart driver support

2014-11-27 2:29 GMT+08:00 Murali Karicheri [off-list ref]:

On 11/25/2014 07:16 AM, Chunyan Zhang wrote:

quoted

Add a full sc9836-uart driver for SC9836 SoC which is based on the

quoted

+#include<linux/clk.h>

How about sorting this includes? asm/irq.h go first followed linux/ in
alphabatical order?

quoted

+static irqreturn_t sprd_handle_irq(int irq, void *dev_id)
+{
+       struct uart_port *port = (struct uart_port *)dev_id;
+       u32 ims;
+
+       ims = serial_in(port, SPRD_IMSR);
+
+       serial_out(port, SPRD_ICLR, ~0);
+
+       if (ims&  (SPRD_IMSR_RX_FIFO_FULL |
+               SPRD_IMSR_BREAK_DETECT | SPRD_IMSR_TIMEOUT)) {
+               sprd_rx(irq, port);
+       }
+       if (ims&  SPRD_IMSR_TX_FIFO_EMPTY)
+               sprd_tx(irq, port);
+
+       return IRQ_HANDLED;

You are always returning IRQ_HANDLED and this is registered as a SHARED irq.
Is there a chance this handler is called and the irq event doesn't
belong to this device?

Murali

You are right, this is not a SHARED irq. I'll pass 0 for irqflags when
called 'devm_request_irq' in the next version patch.

Thank you,
Chunyan